* Gold climbs further on oil but resistance levels intact
* Oil firms above $118 on supply fears
* Investors await second-quarter U.S. GDP data (Updates prices)
By Lewa Pardomuan
SINGAPORE, Aug 28 (Reuters) - Gold rose further on Thursday on safe-haven buying as oil continued its ascent and on a sliding dollar, but it would have to crack key resistance levels to sustain the uptrend.
Gold has rebounded more than 7 percent since tumbling to nine-month lows around $773 an ounce in mid-August. Physical buying ahead of the festive season in Asia helped the rebound but thin volumes also exaggerated movements, dealers said.
Gold <XAU=> firmed to $831.65/832.65 an ounce from $826.05/827.45 an ounce late in New York on Wednesday, when it gained more than $3 an ounce.
"I guess we are still looking at the $840-$845 regions for resistance. I feel this will be the key area to look at," said Adrian Koh, an analyst at Phillip Futures in Singapore.
"Perhaps oil could lead gold higher here, and on the oil side, I think Gustav is something we should watch. For the dollar, we will probably have to focus on tonight's U.S. GDP data for directions," he said.
Oil <CLc1> rose for afourth straight session to stay above $118 a barrel on Thursday on concerns Tropical Storm Gustav will intensify into amajor hurricane as it moves towards energy facilities in the Gulfof Mexico. [
]The euro edged up to $1.4763 <EUR=>, recovering from a six-month low of $1.4570 hit on Tuesday, after comments by a European Central Bank official the previous day scaled back speculation about an ECB rate cut. [
]The U.S. economy probably performed much better in the second quarter than previously thought, as improvement in the trade balance combined with government stimulus to buoy growth, a Reuters poll showed. [
]Spot platinum <XPT=> rose to $1,436.00/1,456.00 an ounce from $1,434.00/1,454.00 late in New York.
Higher gold prices spurred speculative buying in platinum but investors remained cautious after the metal sank to an 11-month low around $1,296 last week. Automakers were also on the sidelines.
"Platinum seems to be edging higher, but I don't think we are clearly out of the downside yet," said Koh of Phillip Futures.
"If platinum can clear the $1,450 level and perhaps make a move to the $1,500 level, then that scenario may change a little."
The bulk of the world's platinum is used by automakers in autocatalyst systems that scrub exhaust fumes of dangerous and environmentally damaging chemicals. Platinum prices are well below a lifetime high of $2,290 hit in early March.
Spot palladium <XPD=> inched down to $287.50/295.50 an ounce from $288.50/296.50 an ounce. Silver <XAG=> firmed to $13.60/13.66 an ounce from $13.49/13.55 an ounce late in New York.
The new benchmark contract on the Tokyo Commodity Exchange, August 2009 <JAUc6>, ended the morning session up 19 yen per gram at 2,949 yen per gram.
Gold futures for December delivery <GCZ8> on the COMEX division of the New York Mercantile Exchange added $3.2 an ounce to $837.20. Precious metals prices at 0219 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 831.15 5.25 +0.64 -0.19 Spot Silver 13.60 0.17 +1.27 -7.92 Spot Platinum 1436.00 2.50 +0.17 -5.53 Spot Palladium 287.50 -1.00 -0.35 -21.88 TOCOM Gold 2949.00 19.00 +0.65 -3.63 13464 TOCOM Platinum 5037.00 37.00 +0.74 -5.66 7987 TOCOM Silver 482.30 -3.30 -0.68 -10.85 614 TOCOM Palladium 1041.00 -7.00 -0.67 -22.95 336 Euro/Dollar 1.4788 Dollar/Yen 109.46 TOCOM prices in yen per gram, except TOCOM silver which is priced in yen per 10 grams. Spot prices in $ per ounce. (Editing by Ben Tan)